Wis. Admin. Code Department of Natural Resources NR 273.042
Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subchapter shall achieve the following effluent limitations representing the degree of effluent reduction attainable by application of BPT:
Table 4-1
Precious Metals
Rolling Spent Emulsions
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals rolled with emulsions | |
Cadmium | 0.026 | 0.012 |
Copper | 0.147 | 0.077 |
Cyanide | 0.023 | 0.010 |
Silver | 0.032 | 0.013 |
Oil and grease | 1.54 | 0.925 |
Total suspended solids | 3.16 | 1.51 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-2
Precious Metals
Drawing Spent Emulsions
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals drawn with emulsions | |
Cadmium | 0.016 | 0.007 |
Copper | 0.091 | 0.048 |
Cyanide | 0.014 | 0.006 |
Silver | 0.020 | 0.008 |
Oil and grease | 0.950 | 0.570 |
Total suspended solids | 1.95 | 0.926 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-3
Precious Metals
Drawing Spent Soap Solutions
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals drawn with soap solutions | |
Cadmium | 0.001 | 0.0005 |
Copper | 0.006 | 0.003 |
Cyanide | 0.0009 | 0.0004 |
Silver | 0.001 | 0.0006 |
Oil and grease | 0.063 | 0.038 |
Total suspended solids | 0.128 | 0.061 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-4
Precious Metals
Metal Powder Production
Wet Atomization Wastewater
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals powder wet atomized | |
Cadmium | 2.27 | 1.00 |
Copper | 12.7 | 6.70 |
Cyanide | 1.94 | 0.802 |
Silver | 2.70 | 1.14 |
Oil and grease | 134 | 80.2 |
Total suspended solids | 274 | 130 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-5
Precious Metals
Heat Treatment Contact Cooling Water
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of extruded precious metals heat treated | |
Cadmium | 1.42 | 0.626 |
Copper | 7.93 | 4.17 |
Cyanide | 1.21 | 0.501 |
Silver | 1.71 | 0.709 |
Oil and grease | 83.4 | 50.1 |
Total suspended solids | 171 | 81.3 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-6
Precious Metals
Semi-Continuous or Continuous Contact Cooling Water
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals cast by the semi-continuous or continuous method | |
Cadmium | 3.50 | 1.55 |
Copper | 19.6 | 10.3 |
Cyanide | 2.99 | 1.24 |
Silver | 4.23 | 1.75 |
Oil and grease | 206 | 124 |
Total suspended solids | 423 | 209 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-7
Precious Metals
Direct Chill Casting Contact Cooling Water
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals cast by the direct chill method | |
Cadmium | 3.67 | 1.62 |
Copper | 20.5 | 10.8 |
Cyanide | 3.13 | 1.30x |
Silver | 4.43 | 1.84x |
Oil and grease | 216 | 130 |
Total suspended solids | 443 | 211 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-8
Precious Metals
Shot Casting Contact Cooling Water
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals shot cast | |
Cadmium | 1.25 | 0.551 |
Copper | 6.98 | 3.67 |
Cyanide | 1.07 | 0.441 |
Silver | 1.51 | 0.624 |
Oil and grease | 73.4 | 44.1 |
Total suspended solids | 151 | 71.6 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-9
Precious Metals
Pressure Bonding Contact Cooling Water
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metal base metal pressure bonded | |
Cadmium | 0.029 | 0.013 |
Copper | 0.159 | 0.084 |
Cyanide | 0.024 | 0.010 |
Silver | 0.034 | 0.014 |
Oil and grease | 1.67 | 1.00 |
Total suspended solids | 3.43 | 1.63 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-10
Precious Metals
Surface Treatment Spent Baths
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals surface treated | |
Cadmium | 0.033 | 0.015 |
Copper | 0.183 | 0.097 |
Cyanide | 0.028 | 0.012 |
Silver | 0.040 | 0.017 |
Oil and grease | 1.93 | 1.16 |
Total suspended solids | 3.95 | 1.88 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-11
Precious Metals
Surface Treatment Rinse
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals surface treated | |
Cadmium | 2.10 | 0.924 |
Copper | 11.7 | 5.16 |
Cyanide | 1.79 | 0.739 |
Silver | 2.53 | 1.05 |
Oil and grease | 123 | 73.9 |
Total suspended solids | 253 | 120 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-12
Precious Metals
Alkaline Cleaning Spent Baths
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals alkaline cleaned | |
Cadmium | 0.021 | 0.009 |
Copper | 0.114 | 0.060 |
Cyanide | 0.018 | 0.007 |
Silver | 0.025 | 0.010 |
Oil and grease | 1.20 | 0.720 |
Total suspended solids | 2.46 | 1.170 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-13
Precious Metals
Alkaline Cleaning Rinse
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals alkaline cleaned | |
Cadmium | 3.81 | 1.68 |
Copper | 21.3 | 11.2 |
Cyanide | 3.25 | 1.35 |
Silver | 4.59 | 1.91 |
Oil and grease | 224 | 135 |
Total suspended solids | 459 | 219 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-14
Precious Metals
Alkaline Cleaning Prebonding Wastewater
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals and base metal cleaned prior to bonding | |
Cadmium | 3.95 | 1.74 |
Copper | 22.1 | 11.6 |
Cyanide | 3.37 | 1.39 |
Silver | 4.76 | 1.97 |
Oil and grease | 232 | 139 |
Total suspended solids | 476 | 226 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-15
Precious Metals
Tumbling or Burnishing Wastewater
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals tumbled or burnished | |
Cadmium | 4.12 | 1.82 |
Copper | 23.0 | 12.1 |
Cyanide | 3.51 | 1.45 |
Silver | 4.96 | 2.06 |
Oil and grease | 242 | 145 |
Total suspended solids | 496 | 236 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Table 4-16
Precious Metals
Sawing or Grinding Spent Emulsions
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals sawed or ground with emulsions | |
Cadmium | 0.032 | 0.014 |
Copper | 0.178 | 0.094 |
Cyanide | 0.027 | 0.011 |
Silver | 0.039 | 0.016 |
Oil and grease | 1.87 | 1.12 |
Total suspended solids | 3.83 | 1.82 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times
Wis. Admin. Code Department of Natural Resources NR 273.042